I'd like to say some words about the output level ot these two lights. After all, the higher the brightness, the larger the current. As far as I know, Pro IBS drives its LED with a current of 1.2Amp under the 100% brightness, while Cree only approves the maximun driving current as 1Amp. So there would be some danger for LED when drived by such a high current if any cooling problem occurs. However of course many civilian users(at least Easterners) demand brightness much more than stability, they will accept a flashlight even it would become dim soon due to the frightening driving current, only 'cozing of the max output level is higher than others. In such a condition, products for civilian usage will more or less put their prime effort on how to accomplish the high current and then secondly control the failure rate in a reasonable range under that case.
As far as I know, the goal while designing the Military edition are stability, reliability and the user-friendly, in another word, they want this light to work under any condition. So they won't risk the LED's life trying to drive them under that high current anymore. In fact, Military's LED only runs at 850mA ---- much less than Pro IBS. Under this setting, both the enery comsuming and temperature of the LED will reduce sigificantly, resulting in not only longer running time but also longer life.
I don't mind that Military is dimmer than Pro IBS. The driving mode of these two light are also not the same. Although Pro IBS can keep the same output level regardless the battery voltage(Military can't do that when supply voltage is less than 4.2V), it will waste much more energy of the battery as well. Both inserted with a full-charged 4.2V RCR18650, the battery current is 1.4A for Pro IBS and 0.8A for Military. The Pro IBS's battery current is 1.75x of Military while the brightness is not that greater. We lost about 20% brightness but got 100% more running life, that is not bad, at least I think that's not bad.
